hi... here's my concern, my last day of my period last month was feb11... i have regular period.. i was hoping my period will come march 7 but did not come until march 10 i already started to take althea because my husband will come on the 19th... since i need to have a week for me to be protected.. my concern is until now march14 and still i dont have my period... will i still be having my period dis month or it will be after i finish the 21tablet..?? plsss help.!